Warning: require_once(/html/typo3/typo3_src-7.6.20/typo3/sysext/rtehtmlarea/ext_emconf.php): failed to open stream: No such file or directory in /html/typo3/typo3_src-7.6.21/typo3/sysext/rtehtmlarea/ext_localconf.php on line 12

Fatal error: require_once(): Failed opening required '/html/typo3/typo3_src-7.6.20/typo3/sysext/rtehtmlarea/ext_emconf.php' (include_path='/html/typo3/typo3_src-7.6.21/vendor/pear/pear_exception:/html/typo3/typo3_src-7.6.21/vendor/pear/http_request2:.:/usr/local/php/lib/php:/usr/local/php/lib/php/PEAR') in /html/typo3/typo3_src-7.6.21/typo3/sysext/rtehtmlarea/ext_localconf.php on line 12